Quick Answer & Harmonic Definition

To play the F# Diminished chord on piano, press the keys F#, A, C simultaneously. In root position, F# is the lowest note. First inversion places A in the bass; second inversion uses C as the lowest note.

Piano Chord

F#dim Piano Chord

Built from two stacked minor thirds. Creates maximum tension and instability. Learn the F# Diminished chord on piano with interactive keyboard, inversions, and audio playback.

Notes
F# – A – C
Intervals
0 – 3 – 6
Type
triad chord
F# A C
E
A
D
G
B
e
3
5
7
9
12
3 notes · Standard (E A D G B E)

Playing the F#dim Piano Chord

The F#dim chord is a diminished chord built on the root F#. It contains 3 notes: F#, A, C. On piano, this chord is played by pressing these keys simultaneously or as an arpeggio.

Built from two stacked minor thirds. Creates maximum tension and instability. Mastering the F#dim chord opens up countless songs and progressions in the key of F#.

Piano Finger Positions for F#dim

For the F#dim triad chord, use these finger positions:

  • Right hand (root position): Thumb (1) on F#, middle finger (3) on A, pinky (5) on C.
  • Left hand (root position): Pinky (5) on F#, middle finger (3) on A, thumb (1) on C.
  • Arpeggiated: Play the notes sequentially from lowest to highest for a broken triad effect.

F#dim Chord Inversions

Inversions change the bass note while keeping the same harmonic quality:

Inversion Bass Note Notes (bottom to top) Sound
Root F# F# – A – C Most stable
1st A A – C – F# Lighter, less stable

Interval Structure of F#dim

Degree Interval Semitones Note in F#
Root Root (R) 0 F#
3rd Minor 3rd 3 A
5th Tritone 6 C

Common Progressions with F#dim on Piano

  • I–IV–V–I: F#dim – Bdim – C#dim – F#dim (classic cadence)
  • I–V–vi–IV: F#dim – C# – D#m – B (pop progression)
  • ii–V–I: G#m – C# – F#dim (jazz turnaround)

Other F# Piano Chords

F#
Major
F#m
Minor
F#7
Dominant 7th
F#maj7
Major 7th
F#m7
Minor 7th
F#aug
Augmented

Diminuto Chord in All 12 Keys

Cdim C#dim Ddim D#dim Edim Fdim F#dim Gdim G#dim Adim A#dim Bdim
Virtual Piano
Interactive keyboard
F#dim Guitar
Guitar chord shapes
F# Scale
Notes that fit this chord
Songs
Find songs using F#dim

Knowledge Base & FAQs

F#dim Piano Chord — FAQ

Everything you need to know about our browser-based Web Audio engine, instruments, and music theory workspace.

How do I play the F#dim chord on piano?

To play the F# Diminished chord on piano, press the keys F#, A, C simultaneously.

In root position, F# is the lowest note. First inversion places A in the bass; second inversion uses C as the lowest note.

What are the notes in the F#dim piano chord?

The F# Diminished piano chord contains 3 notes: F#, A, C.

These are derived from the diminished interval formula applied to the root note F#.

What is the best fingering for F#dim on piano?

For the F#dim triad in root position, use fingers 1 (thumb), 3, and 5 for a triad, or 1, 2, 3, and 5 for a triad chord.

Inversions may use 1, 2, 4 (first inversion) or 1, 3, 5 (second inversion).

What does the F#dim chord sound like?

The F#dim chord has a built from two stacked minor thirds.

creates maximum tension and instability. It provides rich harmonic tension and expressive color within songwriting and jazz arrangements.

What keys does the F#dim chord belong to?

F#dim appears frequently across modal, jazz, blues, and contemporary progressions as an essential tension or resolution voicing.

What are the inversions of F#dim on piano?

F#dim has 2 inversions.

Root position: F#–A–C. First inversion: A–C–F#.

What chords go well with F#dim on piano?

In the key of F# major, F#dim pairs naturally with B major (IV chord), C# major (V chord), and D#m (vi chord).

The I–IV–V–I progression is a classic way to practice these.

Is F#dim a good chord for beginners on piano?

Yes, F#dim is a triad with 3 notes, making it accessible for beginners.

Practice playing all 3 keys simultaneously with proper finger positioning.

How do I use F#dim in a chord progression?

F#dim functions as the tonic (I) in F# major.

A classic progression is I–IV–V–I: F#dim–B–C#–F#dim. Practice this in both hands separately before combining.

What is the difference between F# major and F# minor on piano?

The F# major chord (F#–A#–C#) uses a major third (4 semitones from root) for a bright sound.

The F#m chord uses a minor third (3 semitones) for a darker, more emotional sound.